f(x)=5x^3+5x^2-170x+280is(x+7)

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Solution for f(x)=5x^3+5x^2-170x+280is(x+7) equation: 


Simplifying
f(x) = 5x3 + 5x2 + -170x + 280is(x + 7)

Multiply f * x
fx = 5x3 + 5x2 + -170x + 280is(x + 7)

Reorder the terms:
fx = 5x3 + 5x2 + -170x + 280is(7 + x)
fx = 5x3 + 5x2 + -170x + (7 * 280is + x * 280is)
fx = 5x3 + 5x2 + -170x + (1960is + 280isx)

Reorder the terms:
fx = 1960is + 280isx + -170x + 5x2 + 5x3

Solving
fx = 1960is + 280isx + -170x + 5x2 + 5x3

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.
f = 1960isx-1 + 280is + -170 + 5x + 5x2

Simplifying
f = 1960isx-1 + 280is + -170 + 5x + 5x2

Reorder the terms:
f = -170 + 280is + 1960isx-1 + 5x + 5x2

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